Rockwood, Roy: Dave Dashaway and his Hydroplane. v1. 28 Aug 2014
 

Roy Rockwood was a house pseudonym used by the Stratemeyer Syndicate for boy's adventure books. The name is most well-remembered for the Bomba the Jungle Boy and Great Marvel series.
Excerpt
The man in charge of the place attracted his attention, too. He had only one arm and limped when he walked. His face was scarred and he looked like a war veteran. The only battles this old warrior had been in, however, were fights with the elements. He was a famous "wind wagon" man who had sustained a terrible fall in an endurance race. It had crippled him for life. Now he followed the various professional meets for a living, and also ran an aviation school for amateurs. His name was John Grimshaw.